. >>> reporter: vice president joe biden is in on the negotiations. mitch mcconnell asked him to help out after talks stalled. with hours to go it's hard to tell if lawmakers will be able to agree to a watered down deal. lawmakers left the capital sunday night without a deal in place. but leaders from both parties expressed their willingness to continue working. >> there's still significant difference between the two sides but negotiations continue. >> he want everyone to know i'm willing to get it done but i need a dance partner. >> reporter: some progress was made sunday when republicans dropped a proposal to slow social security growth but the main sticking point between democrats and republicans continues to be over the threshold of tax increases. president obama campaigned on raising taxes on income over $250,000. while many congressional republicans have pushed back against any tax increases. president obama is placing the blame for the impasse on the gop. >> they say that their biggest priority is making sure that we deal with the deficit in a